CN202343085U - Flue gas waste heat recycling and dust removing and purifying compound type equipment - Google Patents
Flue gas waste heat recycling and dust removing and purifying compound type equipment Download PDFInfo
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- CN202343085U CN202343085U CN2011204640136U CN201120464013U CN202343085U CN 202343085 U CN202343085 U CN 202343085U CN 2011204640136 U CN2011204640136 U CN 2011204640136U CN 201120464013 U CN201120464013 U CN 201120464013U CN 202343085 U CN202343085 U CN 202343085U
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- heat exchange
- flue gas
- section
- liquid
- waste heat
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 239000003546 flue gas Substances 0.000 title claims abstract description 50
- 150000001875 compounds Chemical class 0.000 title claims abstract description 36
- 239000002918 waste heat Substances 0.000 title claims abstract description 20
- 239000000428 dust Substances 0.000 title abstract description 13
- 238000004064 recycling Methods 0.000 title abstract description 7
- 239000007788 liquid Substances 0.000 claims abstract description 66
- 239000000779 smoke Substances 0.000 claims abstract description 9
- 239000007789 gas Substances 0.000 claims description 46
- 238000013459 approach Methods 0.000 claims description 18
- 238000000926 separation method Methods 0.000 claims description 16
- 238000011084 recovery Methods 0.000 claims description 14
- 230000008021 deposition Effects 0.000 claims description 11
- 239000006096 absorbing agent Substances 0.000 claims description 8
- 230000008676 import Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000001556 precipitation Methods 0.000 abstract 2
- 239000010865 sewage Substances 0.000 abstract 2
- 238000006477 desulfuration reaction Methods 0.000 description 9
- 230000023556 desulfurization Effects 0.000 description 9
- 239000003517 fume Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 5
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000002745 absorbent Effects 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000010358 mechanical oscillation Effects 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009469 supplementation Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 208000006558 Dental Calculus Diseases 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 229920001617 Vinyon Polymers 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000035568 catharsis Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 230000003020 moisturizing effect Effects 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 150000003457 sulfones Chemical class 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 235000015961 tonic Nutrition 0.000 description 1
- 230000001256 tonic effect Effects 0.000 description 1
- 229960000716 tonics Drugs 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
Flue gas waste heat recycling and dust removing and purifying compound type equipment belongs to the technical field of flue gas waste heat recycling and dust removing and purifying. The compound type equipment comprises a heat exchange absorbing compound device, a dividing wall type heat exchanger, a precipitation collecting and sewage draining device, a solution pool and a liquid pump, wherein a liquid distributor is arranged at the top of the heat exchange absorbing compound device; the dividing wall type heat exchange device is positioned at the lower part of the heat exchange absorbing compound device; and the precipitation collecting and sewage draining device is arranged at the lower part of the heat exchange absorbing compound device. The heat exchange absorbing compound device consists of a flue gas inlet section, a flue gas inlet diversion section, a heat exchange absorbing section, a flue gas outlet liquid stopping diversion section and a flue gas inlet section; and a liquid mesh type liquid film distribution net is arranged in the heat exchange absorbing section. The compound equipment disclosed by the utility model integrates the functions of waste heat recycling and purifying treatment, can be used for recycling sensible heat and latent heat of exhausted smoke and also has the functions of resisting corrosion, removing dust and scale, purifying treatment and the like; and in addition, the flowing resistance and energy consumption of a fan and a water pump are reduced, the cost of products is reduced and the deep recycling of flue gas waste heat is achieved.
Description
Technical field
The utility model relates to a kind of flue gas waste heat recovery utilization and the compound equipment of udst separation; Be particularly related to a kind of low resistance type heat exchange and dust removal integrated set composite of gas cleaning that utilizes flue gas to condense thermal energy; Belong to flue gas waste heat recovery utilization and udst separation technical field, the smoke pre-heating that can be used for common coal-burning boiler and thermal powerplants such as direct combustion machine and cogeneration of heat and power is recycled and udst separation.
Background technology
Thermal powerplants such as plain cylindrical furnace and direct combustion machine and cogeneration of heat and power, exhaust gas temperature is all very high, and is most more than 120-200 ℃, causes energy waste and to the pollution of environment, its thermal efficiency generally is lower than 90%, and coal-burning boiler generally is lower than 80%.One of the main reasons is equipment to be caused corrosion when avoiding flue-gas temperature to be lower than dew-point temperature, will prevent also that for coal-fired thermal powerplant and gas industry stove/kiln dust and dirt from producing.Therefore mainly be to utilize high-temperature flue gas waste heat in the thermal powerplant at present, low-temperature flue gas condensation waste heat does not obtain degree of depth utilization as yet, and flue gas ash removal, desulfurization and recuperation of heat carry out respectively, and equipment is many, big, investment height takes up space.
Set up the flue gas condensing heat exchanger at thermal powerplant afterbodys such as boilers; Exhaust gas temperature is dropped to below the flue gas dew point temperature, not only can utilize the smoke evacuation sensible heat, a large amount of latent heat of emitting when steam condenses in the also recyclable utilization smoke evacuation; Thereby energy savings, and reduce noxious gas emission.For dividing wall type flue gas condensing heat exchanger, fume gas condensation liquid can dissolve and absorb CO in the smoke evacuation
X, NO
X, SO
XEtc. the part pernicious gas, flue gas also had certain catharsis.But do not reach when requiring at fume emission, particularly during dust-laden, the easy ash deposit and slag buildup of dividing wall type flue gas condensing heat exchanger is used and is limited to.And direct contact type flue gas condensing heat exchanger, wet method also capable of using is carried out desulfurization and dedusting, can reach the fume afterheat degree of depth and recycle and the dust removal integrated effect of gas cleaning.But need to solve three main key technical problems: the one, liquid such as flue gas condensing liquid and smoke-gas wet desulfurization are to the corrosion on Equipment problem; The 2nd, in flue gas, contain the fouling anti-tartar problem under the situation such as dust; The 3rd, no matter present wet desulphurization is liquid-film method or the problem that the flow resistance of absorption tower method is big, the blower fan water pump power consumption is big.
At present the wet dedusting desulfurization integration apparatus adopts filler mostly to be that with arranging horizontal direction, its flow process adopt the vertical reverse flow with solution of flue gas more, and flow resistance greatly and employing material and structure is perishable and fouling.
Situation in view of present prior art; The research and development dustproof scale protective type flue gas to condense thermal energy of lower resistance composite anti-corrosive that is fit to various coal burning and gas burning boilers recycle with flue gas and handle integrated set composite; Be efficiently to utilize the energy to reduce to discharge effective way, become energy environment field hot subject.
The utility model content
The purpose of the utility model provides a kind of flue gas waste heat recovery utilization and the compound device of udst separation; In the hope of solve in the prior art flue gas recycle with dust separation device be provided with respectively the equipment that is brought many, take up space big, invest height, flow resistance is big and problem such as energy consumption height; Reach and use the low-carbon energy-saving emission-reduction technology; Reduce to greatest extent product cost, cut down the consumption of energy, the degree of depth reclaims fume afterheat and the purpose of udst separation, thereby improve such cost performance of product.
The technical scheme of the utility model is following: a kind of flue gas waste heat recovery utilization and the compound equipment of udst separation; It is characterized in that: this equipment contains heat exchange absorbing compound device, dividing wall type heat exchanger, deposition collection blowdown apparatus, solution pool and liquid pump; Top at described heat exchange absorbing compound device is provided with liquid distribution trough; Described wall-type heat exchange device is positioned at the bottom of heat exchange absorbing compound device, and described deposition is collected the bottom that blowdown apparatus is positioned at the wall-type heat exchange device; The import of said solution pool is collected blowdown apparatus through connecting line and deposition and is connected, and the outlet of solution pool links to each other with liquid distribution trough with circulation line through liquid pump; Described heat exchange absorbing compound device is made up of gas approach section, gas approach diversion section, heat exchange absorber portion, exhanst gas outlet diversion section and exhanst gas outlet section; In the heat exchange absorber portion, vertically be furnished with multilayer liquid mesh-type liquid film distribution of net, leave the gap between each layer.
In the technique scheme, be provided with acclivitous flow deflector in the described gas approach section, in the exhanst gas outlet section, be provided with acclivitous retaining liquid flow deflector.Described gas approach diversion section is the flaring section, and the exhanst gas outlet diversion section is a tapered cross-section.Described liquid mesh-type liquid film distribution of net adopts has the liquid film distribution of net of network, herringbone grid or twill grid.
The utility model compared with prior art has the following advantages and the high-lighting effect:
1. the utility model is owing to adopted the heat exchange absorbing compound device; Vertical arranging multiplayer liquid mesh-type liquid film distribution of net has increased the liquid film surface area greatly in the heat exchange absorber portion, has increased gas-liquid contact heat-exchanging area; Strengthen heat and mass, improved gas cleaning and efficiency of dust collection; And selected materials can effectively prevent corrosion, and dirt is difficult for generation at vertical mesh, and easy-to-use mechanical oscillation or chemical method scale removal, and mud is collected blowdown apparatus through deposition and discharged, and collects recycling as raw material.Adopt the direct contact heat transfer mode to take into account the wet dedusting effect simultaneously; Dirt is difficult for generating at vertical mesh; And easy-to-use mechanical oscillation or chemical method scale removal are prone to ash deposit and slag buildup thereby overcome dividing wall type flue gas condensing heat exchanger under the dust contained flue gas condition, its application receives the limitation problem.
2. the utility model adopts the absorption integrated structure of heat exchange; Overcome conventional dedusting and purifying and dedusting equipment and be provided with respectively that the initial cost that caused is high, big problem takes up space; Reduce to greatest extent product cost, reduce to take up an area of the space, cut down the consumption of energy, can reach the degree of depth and recycle fume afterheat and udst separation flue gas purpose; Can flue gas cycle of treatment liquid (like desulfurizing agent) temperature be reduced again; Further improve gas cleaning efficient (as dropping to 50 ℃ of desulfurization preferred temperature), the fume afterheat degree of depth is recycled.Thereby improve China's flue gas treatment and purification level.Improve such cost performance of product, make it to become the low-carbon energy-saving emission abatement device.
3. the gas approach diversion section that provides of the utility model is the flaring section, and the porch streamwise is provided with flow deflector, and the exhanst gas outlet diversion section is a tapered cross-section, and the exit streamwise is provided with water conservancy diversion retaining liquid sheet; Flue gas gets into from side-lower, discharges from side top, and the circulation fluid of smoke treatment is liquid distribution net and descend from the upper edge, forms approximate adverse current, and makes device flow field, temperature field, distribution of concentration even, makes device give full play to the function of caloic exchange and absorption.
In a word, the utility model not only can be recycled smoke evacuation sensible heat and latent heat, also has effects such as anticorrosion dedusting antiscale, purified treatment concurrently, and reduces flow resistance and blower fan and pump energy consumption, reduces the cost of product, reaches the fume afterheat degree of depth and recycles.
Description of drawings
A kind of flue gas waste heat recovery utilization that Fig. 1 provides for the utility model and the overall structure principle schematic of the compound equipment of udst separation.
Fig. 2 a, 2b and 2c are the structural representation of heat exchange absorbing compound device, and wherein Fig. 2 a is a front view), Fig. 2 b is a vertical view, Fig. 2 c is a left view.
Fig. 3 a and 3b are respectively the liquid mesh-type liquid film distribution of net of network and herringbone grid.
Among the figure: the 1-liquid distribution trough; 2-heat exchange absorbing compound device; The 3-dividing wall type heat exchanger; The 4-deposition is collected blowdown apparatus; The 5-solution pool; The 6-liquid pump; 7-exhanst gas outlet section; 8-exhanst gas outlet retaining liquid diversion section; 9-heat exchange absorber portion; 10-gas approach section; 11-gas approach diversion section; The outlet of 12-heated medium; 13-heated medium inlet; The 14-slagging coutrol valve; The 15-connecting line; The 16-liquid supplementation pipe; The 17-circulation line; 18-retaining liquid flow deflector; The 19-flow deflector.20-liquid mesh-type liquid film distribution of net.
The specific embodiment
Below in conjunction with accompanying drawing the structure of the utility model and principle and the course of work are further described.
A kind of flue gas waste heat recovery utilization that Fig. 1 provides for the utility model and the overall structure principle schematic of the compound equipment of udst separation, this equipment contain heat exchange absorbing compound device 2, dividing wall type heat exchanger 3, deposition collects blowdown apparatus 4, solution pool 5 and liquid pump 6.Be provided with liquid distribution trough 1 at the top of heat exchange absorbing compound device 2, wall-type heat exchange device 3 is positioned at the bottom of heat exchange absorbing compound device, and deposition is collected the bottom that blowdown apparatus 4 is positioned at the wall-type heat exchange device; The import of solution pool 5 is collected blowdown apparatus through connecting line 15 and deposition and is connected, and the outlet of solution pool 5 links to each other with liquid distribution trough 1 with circulation line 17 through liquid pump 6.
Fig. 2 a, 2b and 2c are the structural representation of heat exchange absorbing compound device, and this heat exchange absorbing compound device 2 is made up of gas approach section 10, gas approach diversion section 11, heat exchange absorber portion 9, exhanst gas outlet diversion section 8 and exhanst gas outlet section 7; In the heat exchange absorber portion, vertically be furnished with multilayer liquid mesh-type liquid film distribution of net 20, will leave certain interval between each layer.Liquid mesh-type liquid film distribution of net can adopt have network, the liquid film distribution of net (shown in Fig. 3 a, 3b) of herringbone grid or twill grid, its material adopts vinyon, polytetrafluoroethylene (PTFE), fragrant sulfone synthetic fibre, carbon fiber or graphite fibre or glass fibre.
In described gas approach section 10, be provided with acclivitous flow deflector 19 along the flow of flue gas direction; The gas approach diversion section is the flaring section; In exhanst gas outlet section 7, be provided with acclivitous retaining liquid flow deflector 18 along the flow of flue gas direction, the exhanst gas outlet diversion section is a tapered cross-section; Flue gas gets into from side-lower, discharges from side top, and the circulation fluid of smoke treatment is liquid distribution net and descend from the upper edge, forms approximate adverse current, and makes device flow field, temperature field, distribution of concentration even, makes device give full play to the function of caloic exchange and absorption.
The operation principle and the course of work of the utility model are following:
Solution in the solution pool 5 or water are transported to the liquid distribution trough 1 at top through liquid pump 6 and circulation line 17; Liquid distribution trough arrives liquid mesh-type liquid film distribution of net 9 with solution or water distribution; Flow into the dividing wall type heat exchanger 3 of below from top to bottom; Be precipitated to then and collect blowdown apparatus 4, get into solution pool 5 again, form solution recycle system.Boiler tail flue gas gets into heat exchange absorbing compound device 2 through gas approach section 10 from side-lower, and under the effect of gas approach flow deflector 19 and gas approach diversion section 11, flue gas is uniformly distributed on the liquid mesh-type liquid film distribution of net 20; When carrying out the caloic exchange with liquid film; Gas such as dust and sulfur dioxide is dissolved in the solution, and desulfurization or out of stock chemical reaction take place, and flue gas is through flue gas diversion section 8 thereafter; Discharge behind retaining liquid flow deflector 18 from the side top, retaining liquid flow deflector has the dash effect concurrently.Dust forms silt after dissolving water, gets into deposition and collects blowdown apparatus 4, in chemical reaction processes such as desulfurization, generates solid matter; Regularly discharge through control valve 14; When solution is calcium oxide, can generate calcium sulfate with the sulfur dioxide reaction, the raw material that can be used as gypsum reclaim.When solution concentration is undesirable, can be through 16 pairs of solution pool tonics of liquid supplementation pipe or moisturizing to satisfy the demand.Temperature raises behind the solution absorption fume afterheat; Absorbent properties can descend; Adopt the dividing wall type heat exchanger of bottom; Preheating heated medium (like preheating heat supply backwater or preboiler combustion air or other media) can be passed to dividing wall type heat exchanger opposite side heated medium with the heat of solution absorption, and the reduction of solution self temperature helps improving the dissolving absorbent properties.Realize waste heat recovery and udst separation composite effect like this.
For fire coal boiler fume heat recovery and desulfurization and dedusting, can in solution pool, add desulfurization with alkali lye (like NaOH, CaO etc.), utilize and purify for the gas fired-boiler flue gas waste heat recovery, can in solution pool, add entry or denitration solution (like urea etc.).
Claims (4)
1. flue gas waste heat recovery utilization and the compound equipment of udst separation; It is characterized in that: this equipment contains heat exchange absorbing compound device (2), dividing wall type heat exchanger (3), deposition collection blowdown apparatus (4), solution pool (5) and liquid pump (6); Be provided with liquid distribution trough (1) at the top of described heat exchange absorbing compound device; Described wall-type heat exchange device (3) is positioned at the bottom of heat exchange absorbing compound device, and described deposition is collected the bottom that blowdown apparatus (4) is positioned at the wall-type heat exchange device; The import of said solution pool (5) is collected blowdown apparatus through connecting line (15) and deposition and is connected, and the outlet of solution pool (5) links to each other with liquid distribution trough with circulation line (17) through liquid pump (6); Described heat exchange absorbing compound device is made up of gas approach section (10), gas approach diversion section (11), heat exchange absorber portion (9), exhanst gas outlet diversion section (8) and exhanst gas outlet section (7); In the heat exchange absorber portion, vertically be furnished with multilayer liquid mesh-type liquid film distribution of net (20), leave the gap between each layer.
2. according to described a kind of flue gas waste heat recovery utilization of claim 1 and the compound equipment of udst separation; It is characterized in that: the smoke outlet streamwise in described gas approach section (10) is provided with acclivitous flow deflector (19), in exhanst gas outlet section (7), is provided with acclivitous retaining liquid flow deflector (18).
3. according to described a kind of flue gas waste heat recovery utilization of claim 1 and the compound equipment of udst separation, it is characterized in that: described gas approach diversion section (11) is the flaring section, and the exhanst gas outlet diversion section is a tapered cross-section.
4. according to described a kind of flue gas waste heat recovery utilization of claim 1 and the compound equipment of udst separation, it is characterized in that: described liquid mesh-type liquid film distribution of net (20) adopts has the liquid film distribution of net of network, herringbone grid or twill grid.
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CN2011204640136U CN202343085U (en) | 2011-11-21 | 2011-11-21 | Flue gas waste heat recycling and dust removing and purifying compound type equipment |
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CN2011204640136U CN202343085U (en) | 2011-11-21 | 2011-11-21 | Flue gas waste heat recycling and dust removing and purifying compound type equipment |
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CN2011204640136U Expired - Fee Related CN202343085U (en) | 2011-11-21 | 2011-11-21 | Flue gas waste heat recycling and dust removing and purifying compound type equipment |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102407070A (en) * | 2011-11-21 | 2012-04-11 | 北京建筑工程学院 | Composite equipment for flue gas waste heat recovery and dust cleaning |
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2011
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN102407070A (en) * | 2011-11-21 | 2012-04-11 | 北京建筑工程学院 | Composite equipment for flue gas waste heat recovery and dust cleaning |
CN102407070B (en) * | 2011-11-21 | 2013-12-11 | 北京建筑工程学院 | Composite equipment for flue gas waste heat recovery and dust cleaning |
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Granted publication date: 20120725 Termination date: 20171121 |